Metal stacking bar



FIG. 1 is a top perspective view of the metal stacking bar showing our new design;

FIG. 2 is a bottom perspective view of the metal stacking bar of FIG. 1;

FIG. 3 is a side view of the metal stacking bar of FIG. 1, all three sides looking the same;

FIG. 4 is a top view of the metal stacking bar of FIG. 1; and,

FIG. 5 is a bottom view of the metal stacking bar of FIG. 1. 

The ornamental design for a metal stacking bar, as shown and described. 